Danu "Danu" is a Yao word meaning "don't forget". The festival is scheduled for may 29 in the lunar calendar. Legend has it that this day is the birthday of the ancestor of the Yao people, "Zu Niang", so it is also called "Zu Niang Festival". Legend has it that her grandmother's name was Miloda, and she sent her third daughter to take the grain to the mountains to reclaim the wilderness. Milotto gave the third daughter a treasured bronze drum and helped her drive away bird pests so that the grain could be harvested. Since then, the third daughter of the grandmother has lived and worked in peace and contentment in the mountains, breeding offspring and becoming the Yao people. In order to commemorate Milota, the Yao people set her birthday as "Danu Festival".
On the day of the festival, the Yao villages and villages should be cleaned up, and sacrificed to the ancestors sweet rice wine and glutinous rice dumplings, according to the traditional customs, every family should kill chickens and slaughter sheep, young men and women dressed in festive costumes gathered at the place where the reservation was booked, beating the copper drums that symbolized the ancestral mother's legacy, sincerely wishing the grandfather a happy birthday, and wishing the Yao family and livestock a prosperous and harvest every year. When performing drumming, people also compete to toast the best drummers and give them the name of "Drum King". In addition, they must sing the ancient song of "Milotha" that has been handed down to the world, dance cheerfully, and sing the merits of the grandmother.
The cattle festival of the Yao people is also related to agricultural production. In the Yao area, cattle are an important animal power, ploughing the land and rake the field are used cattle power, in the past some areas of the Yao people also used cattle power to pull the car to transport things, cattle in the production of labor this important role, so that people love cattle, cherish the mood of cattle, thus forming a cow worship habit, and the formation of cattle festival. According to Yao folklore, the eighth day of the first month of April in the summer calendar is the birthday of the cow, so people regard this day as the cow festival. On the day of the Cattle Festival, cattle are forbidden for one day, and you cannot shout at the cattle, let alone beat the cattle with whips and sticks. On the day of the Cattle Festival, families should kill chickens, ducks, snails, and loach to sacrifice cattle pens.
The cow nose ring is taken off, together with 3 stones, 3 peaches, and a small scarecrow (symbolizing a shepherd boy), it is loaded into a bamboo basket and hung on the bullpen, commonly known as "protecting the soul of the cow". In the Buchuan area of Guangxi, people feed the cattle with wine and eggs, drive the cattle to the best places for water and grass to graze, and sit on the grass to taste the food brought from home. In the evening, the cattle are washed clean before the cattle are driven home. After the cattle return to the pen, people light incense and set off firecrackers to worship the cow god and bless the cattle with no disasters.
The Yao people in the Guiping area of Guangxi Province, every household wraps five-colored sticky rice with fresh mango leaves, takes it to the cattle pen to offer sacrifices, burns incense to worship the cow god, and prays that the cultivated cattle will be free of disasters, the six animals will prosper, and the grain will be abundant. The sticky rice is then fed to the cattle.